苦味酸钾对含RDX硝铵火药热行为与点火性能的影响

Effect of Potassium Picrate on Thermal Behavior and Ignition Properties of Nitramine Powder Containing RDX

为改善含RDX硝胺火药存在的低压点火难、燃烧压力前沿上升慢的问题,采用差示扫描量热仪(DSC)和小型密闭爆发器装置,研究了苦味酸钾(KP)对含RDX硝铵火药热行为及其点火性能的影响。结果表明,KP分解放热补偿了RDX的熔融吸热,调整了含RDX硝铵火药体系的热行为,改善了硝铵火药的点火性能,且当体系中KP与RDX的质量比大于1时效果更显著;随着体系中KP含量的增加,火药的点火延迟时间明显下降。

There are some disadvantages of nitramine powder containing RDX. First,it is difficult to ignite at low pressure; secondly, after being ignited the combustion pressure rises slowly. To improve its performance, the effect of potassium picrate on thermal behavior and ignition property of nitramine powder containing RDX was studied by DSC and a small closed bomb test. The results show that the decomposition exothermicity of KP compensates the melting endothermicity of RDX, potassium picrate can adjust the thermal behavior and improve the ignition property of nitramine powder,and the effect is more obvious when the mass proportion of KP to RDX is more than one. With the increase of the amount of KP in nitramine powder containing RDX, the ignition delay time can be reduced greatly and the ignition property can be improved.